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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include "src/core/lib/gpr/mpscq.h"
#include <inttypes.h>
#include <stdlib.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/sync.h>
#include "src/core/lib/gpr/useful.h"
#include "src/core/lib/gprpp/thd.h"
#include "test/core/util/test_config.h"
typedef struct test_node {
gpr_mpscq_node node;
size_t i;
size_t* ctr;
} test_node;
static test_node* new_node(size_t i, size_t* ctr) {
test_node* n = static_cast<test_node*>(gpr_malloc(sizeof(test_node)));
n->i = i;
n->ctr = ctr;
return n;
}
static void test_serial(void) {
gpr_log(GPR_DEBUG, "test_serial");
gpr_mpscq q;
gpr_mpscq_init(&q);
for (size_t i = 0; i < 10000000; i++) {
gpr_mpscq_push(&q, &new_node(i, nullptr)->node);
}
for (size_t i = 0; i < 10000000; i++) {
test_node* n = reinterpret_cast<test_node*>(gpr_mpscq_pop(&q));
GPR_ASSERT(n);
GPR_ASSERT(n->i == i);
gpr_free(n);
}
}
typedef struct {
size_t ctr;
gpr_mpscq* q;
gpr_event* start;
} thd_args;
#define THREAD_ITERATIONS 10000
static void test_thread(void* args) {
thd_args* a = static_cast<thd_args*>(args);
gpr_event_wait(a->start, gpr_inf_future(GPR_CLOCK_REALTIME));
for (size_t i = 1; i <= THREAD_ITERATIONS; i++) {
gpr_mpscq_push(a->q, &new_node(i, &a->ctr)->node);
}
}
static void test_mt(void) {
gpr_log(GPR_DEBUG, "test_mt");
gpr_event start;
gpr_event_init(&start);
grpc_core::Thread thds[100];
thd_args ta[GPR_ARRAY_SIZE(thds)];
gpr_mpscq q;
gpr_mpscq_init(&q);
for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
ta[i].ctr = 0;
ta[i].q = &q;
ta[i].start = &start;
thds[i] = grpc_core::Thread("grpc_mt_test", test_thread, &ta[i]);
thds[i].Start();
}
size_t num_done = 0;
size_t spins = 0;
gpr_event_set(&start, (void*)1);
while (num_done != GPR_ARRAY_SIZE(thds)) {
gpr_mpscq_node* n;
while ((n = gpr_mpscq_pop(&q)) == nullptr) {
spins++;
}
test_node* tn = reinterpret_cast<test_node*>(n);
GPR_ASSERT(*tn->ctr == tn->i - 1);
*tn->ctr = tn->i;
if (tn->i == THREAD_ITERATIONS) num_done++;
gpr_free(tn);
}
gpr_log(GPR_DEBUG, "spins: %" PRIdPTR, spins);
for (auto& th : thds) {
th.Join();
}
gpr_mpscq_destroy(&q);
}
typedef struct {
thd_args* ta;
size_t num_thds;
gpr_mu mu;
size_t num_done;
size_t spins;
gpr_mpscq* q;
gpr_event* start;
} pull_args;
static void pull_thread(void* arg) {
pull_args* pa = static_cast<pull_args*>(arg);
gpr_event_wait(pa->start, gpr_inf_future(GPR_CLOCK_REALTIME));
for (;;) {
gpr_mu_lock(&pa->mu);
if (pa->num_done == pa->num_thds) {
gpr_mu_unlock(&pa->mu);
return;
}
gpr_mpscq_node* n;
while ((n = gpr_mpscq_pop(pa->q)) == nullptr) {
pa->spins++;
}
test_node* tn = reinterpret_cast<test_node*>(n);
GPR_ASSERT(*tn->ctr == tn->i - 1);
*tn->ctr = tn->i;
if (tn->i == THREAD_ITERATIONS) pa->num_done++;
gpr_free(tn);
gpr_mu_unlock(&pa->mu);
}
}
static void test_mt_multipop(void) {
gpr_log(GPR_DEBUG, "test_mt_multipop");
gpr_event start;
gpr_event_init(&start);
grpc_core::Thread thds[50];
grpc_core::Thread pull_thds[50];
thd_args ta[GPR_ARRAY_SIZE(thds)];
gpr_mpscq q;
gpr_mpscq_init(&q);
for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
ta[i].ctr = 0;
ta[i].q = &q;
ta[i].start = &start;
thds[i] = grpc_core::Thread("grpc_multipop_test", test_thread, &ta[i]);
thds[i].Start();
}
pull_args pa;
pa.ta = ta;
pa.num_thds = GPR_ARRAY_SIZE(thds);
pa.spins = 0;
pa.num_done = 0;
pa.q = &q;
pa.start = &start;
gpr_mu_init(&pa.mu);
for (size_t i = 0; i < GPR_ARRAY_SIZE(pull_thds); i++) {
pull_thds[i] = grpc_core::Thread("grpc_multipop_pull", pull_thread, &pa);
pull_thds[i].Start();
}
gpr_event_set(&start, (void*)1);
for (auto& pth : pull_thds) {
pth.Join();
}
gpr_log(GPR_DEBUG, "spins: %" PRIdPTR, pa.spins);
for (auto& th : thds) {
th.Join();
}
gpr_mpscq_destroy(&q);
}
int main(int argc, char** argv) {
grpc::testing::TestEnvironment env(argc, argv);
test_serial();
test_mt();
test_mt_multipop();
return 0;
}
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